Out of Stock

Description

Surly’s Mr. Whirly isn’t what you did to your friend at a party in college—well, maybe it is—but it’s also Surly’s badass answer to the single-speed crankset. Mr. Whirly’s arms and spider are forged from hardy 7075-T6 aluminum and connect to a durable 33t stainless steel chainring for rock-slapping, log-hopping pleasure.